Interesting Dave, I didn't know Police were there first, but they had this silly huge split, between TX and RX freqs, which still plagues Low band comms today, some allocations are 13.5 meg apart, most are 10 meg, but that huge split, gives fading Nulls, in different spots down the road , on Rx and Tx, what idiot thought of that? High Band is Fine with its 4.8 megs split

When FM was first started in the USA, by Edwin Armstrong (who invented FM) It was on, around 50 megs, Some of the old Band 1 TV freqs, could be used for another UK FM band, just for local use, their not much good for comms, but high power use, could interfere with use over the English channel But suppose that would give more listening choice, cant have that ...Rod Watts